Means for ventilating railway motors



- D. C. HERSHBERGER MEANS FOR VENTILATING RAILWAY MOTORS Filed July 20. 1923 3 Sheets-Sheet 1 wmvassss: INVENTOR Da Wd 6. Hershbergez BY SWWMM ATTORNEY Sept. 9 1924.

D. C. HERSHBERGER MEANS FOR VENTILATING RAILWAY MOTORS Filed July 20. 1923' :s Sheets-Sheet INVENTOR ATTORNEY Sept. 9, 1924.

D. c. HERSHBERGER- MEANS FOR VENTILATING RAILWAY MOTORS Filed July 20,

3 sheets s hee t 3 WITNESSES:

- INVENTOR DaV/JCHE/Shberger wheels of the vehicle.

Patented Sept. 9, 1924.

1,508,225; emce.

DAVID C. HERSHBEBGER, or TURTLE CREEK, PENNSYLVANIA, ASSIGNO'R TO INGHOUSE ELECTRIC 6; MANUFACTURING, COMPANY, A CORPORATION or PENN- SYLVAN IA.

1VIEANS FORVENTILATING RAILW'AY MOTOR-S.

Application filed zuiyeo,

To aZZ whom it may concern:

Be it known that I, DAVID C. I-Inasnnnncnn, a citizen of the United States, and a resident of Turtle Creek, in the county of Allegheny and State of Pennsylvania, have invented a newand useful Improvement in Means for Ventilating Railway Motors, of which the following is a specification.

My invention relates to the ventilation of railway motors and it has particular relation to externally mounted fans which can be placed upon the free end of the motor shaft opposite the gearing housing, whereby t] e rating of the motor may be materially increased without necessitating the employment of a larger shaft or otherwise changing the original design of the motor.

In railway motors, as is well lmown, the space limitations are very exacting. My invention has special reference to the type of structure comprising a vehicle truck hating mounted thereon an electric motor which is provided at one end with a gear and the mechanism for driving the driving IV here such motors are provided without a special ventilating fan, it is extremely difficult, if not impossible, to add a fan within the motor housing after the motor is once completed since it would not only necessitate a new end bracket providing space for the fan, but this would, in turn, necessitate the employ ment of a larger shaft since the greater distance between the bearings of the shaft would involve excessive vibration and whipping which would rapidly wear out the bearings. A larger shaft, however would necessitate practically redesigning the mo tor in order to accommodate the same.

In many instances it may be desirable to increase the capacity of motors, which al-- though provided with internally disposed ventilating means, such as fans, are assigned to duties which exceed their originally rated capacity. It is the object of my present invention to devise means whereby a fan may be applied directly tothe propulsion motor while requiring a mlnim'um of changes in the motor itself.

According to my invention, therefore, I take out the old shaft which was originally" provided for the motor and replace it by one of the same size but of slightly increased 1923. Serial No. 652,687.

length, whereby an end extension is provided on the end of the shaft opposite the gear casing. Any'suitab'le form of fan is then mounted upon the shaft extension and the fan may be provided with a suitable protective housing or casing or with means outlay for renewal parts and a maximum of reliability and economy in operation.

Another object of my invention is to pro-:- vide a fan housing for externally mounted fans of dynamo-electric machines that shall be simple, light and inexpensive in con struction and that may be manufactured with a minimum amount of machine work.

A still further object of my invention is to provide a combined bearing and fan housing for externally mounted fans ofdynamo-electric machines.

'With the foregoing and other objects in view, my invention consists in the arrangement" and details of construction described and claimed hereinafter and illustrated in the accompanying drawing, wherein Figure 1 is a plan view" of a porti'onof a railway vehicle truck illustrating the driv ing motor and the vehicle wheels v Fig. 2 is an elevational view of a portion of the driving motor illustrating a combined bearing and fan housing embodying my invention, the" front guard and fan being removed; L

Fig. 3 is a vertical sectional view' of a structure embodying my invention, taken" along the lines III-III of Fig. 2; I

Fig. 4 isa sectional view taken along the line IV IV of Fig. 2; and

Fig. 5 is a sectional view in the sameplane as Fig. 4, but showing" a modification.

of my invention.

In Fig. 1, an enclosed electric; driving motor 1 is mounted between tw'owneels 2- of a vehicle. One end of the motor carries} a gear casing and gears 3 for driving an axle: to which the two wheels are secured. The other end of th motor isfree' and carries" an external fan 4 and a fan housing 5 for ventilating and cooling the motor.

The arrangement of the fan 1 and of the fan housing 5 is illustrated in detail in Figs. 2 to 4. The motor 1 is provided with a circular opening 6 for supporting an end bell or hearing housing 7 for a rotatable armature shaft 8.

The bearing housing comprises a bearing member 9 which may be of any commonly used construction and is shown as having a bearing sleeve 10 which is surrounded by a lubricator housing 11 communicating with the shaft 8 through an opening 11a. The upper portion of the lubricator housing 11 is provided with an opening 12 having a hinged cover 13 for closing the same. The rear portion of the lubricator housing extends into a circular flange 1 1 for cooperative engagement with a corresponding flange 15 of the motor opening 6.

The front portion of the lubricator housing is provided with the fan housing 5 having a substantially cylindrical extension 16 for housing the fan 4 which is mounted upon an extending portion 1'? of the armature shaft 8.

Surrounding the lubricator casing and in spaced relation thereto, is an integral cast member 18 serving as an outer enclosing wall for a pluralit; of air spaces or channels 19 extending between the fan housing and the interior of the motor.

The cylindrical portion 16 of the fan housing 5 has a plurality of windows 20. A guard or cover 21 is secured to the open end of the cylindrical extension 16 for preventing dirt or other foreign particles from entering the housing.

In operation, the rotation of the fan 4 will create a powerful suction and draw a stream of air from the interior of the motor through the ventilating passages or channels 19 of the bearing housing into the fan housing 5, the heated air being discharged by the fan through the windows 20 of the housing. The direction. of the flow of the air is indicated by arrows 22.

It will be noted that the bearing housing provides a very rugged and simple means for adapting any motor which is not provided with an internal cooling system for ventilation by means of an external fan.

In Fig. 5 is shown a modification of my invention, wherein the fan blows the air into the motor instead of drawing it therefrom. The construction of the bearing housing 7 is similar to that of Fig. 1 except that the ventilating passages or channels 19 extend from the periphery of the fan housing 16 instead of from the central portion near the bearing member 9. The portions of the bearing housing constituting the walls of the ventilating passages 19 are arranged to permit free access to the cover 13 and opening 12 of the lubricator housing 11 as shown in. Fig. 3.

The front wall or guard 21 of the fan housing 16 in Fig. 5 is cast and provides in its central portion 23 an inta e for the cooling air. The intake is so shaped that the walls provide bafl'le plates or U-shaped passages 2% for the air which is drawn inwardly by the fan, causing the air flowing therethrough to deposit foreign matter like slush and snow before entering the interior of the housing.

Various modifications of my invention may be made without departing from the spirit thereof and it is my desire that the accompanying claims shall be construed to cover any modifications which come within the scope thereof, when read in the light of the prior art.

I claim as my invention:

1. A hearing housing comprising a cylindrical bearing member, a flange portion on the rear end of said bearing member and a substantially cylindrical fan housing extending in front of said bearing member.

2. A. hearing housing end bell for a dynamo-electric machine comprising a cylindrical bearing member, a flanged portion on the rear end of said bearing member for attachment to the frame of the machine, and a fan housing extending in front of said bearing member, said bearing housing being provided with air passages extending from the front to the rear portion thereof.

A. bearing housing comprising a bearing member, a lubricator housing adjacent to said bearing member, a circular flange extending on the rear side of said lubricator housing and a fan housing in front of said lubricator housing.

a. A. bearing housing comprising a bearing member, a lubricator housing adjacent to said bearing member, a circular flange adjacent said lubricator housing and a fan housing in front of said lubricator housing, said bearing-housing being provided with ventilating channels extending from said fan housing to the rear of said flange.

5. In a dynamo-electric machine, the combination with a stator frame having a circular end opening, of a bearing housing com prising a circular flange for mounting in said opening and a housing for a fan mounted in front of said bearing housing.

6. In a dynamo-electric machine, the combination with a stator frame having a circular end opening, of a bearing housing comprising a bearing member having a lubricator housing adjacent thereto, an integral, outwardly projecting flange member for mounting in said end opening and an integral substantially cylindrical extension for housing a fan adapted to be mounted outside of said dynamo-electric machine, said bearing housing being, provided with ventilating channels extending from said fan housing to the interior of said dynamo'electric machine.

7 In a. dynamo-electric machine, the combination with a stator frame having a circular end opening, of a circular member disposed within said opening and having a flange fitting said frame opening, and an integral, substantially cylindrical extension disposed outside of said frame for housing a fan mounted adjacent said dynamo-electric machine. I

8. In a dynamo-electric machine, the combination with a stator frame having a circular end opening, of a circular member disposed within said opening and having a flange fitting said frame opening, and an integral, substantially cylindrical extension disposed outside of said frame for housing a fan mounted adjacent said dynamo-electric machine, said member being provided with ventilating channels extending from said fan housing to the interior of said dynamo-electric machine.

9. In a dynamo-electric machine, the combination with a stator frame having a circular end opening, of a circular member disposed withinsaid opening and having a flange fitting said frame opening, a bearing member, an integral, substantially cylindrical extension disposed outside of said bearing member for housing a fan mounted adjacent to said dynamo-electric machine, and means associated with said fan-housing extension for providing a tortuous air passage for the air entering the same.

10. In a dynamo-electric machine, the combination with a stator frame having a circular end opening and a circular member having a flange fitting-said opening, of an integral, substantially cylindrical extension disposed on the outer'end of said frame for housing a fan mounted adjacent to said dynamo-electric machine, and a detachable cover mounted in front of said fan housing and enclosing the same, said cover being provided with an air intake having baffle plates disposed within the same for providing a tortuous air passage for the air entering the fan housing.

11. In a railway vehicle, the combination with an electric motor having a shaft and two bearings for supporting said shaft, of a driving mechanism mounted upon one end of said motor and a ventilating fan member mounted on the other side of said motor and outside thereof. I

side of said casing upon the other end of said shaft.

13. In a railway vehicle, the combination with an electric driving motor having an enclosing casing and a shaft, of a driving mechanism for said railway vehicle mounted upon one end of said shaft, a bearing member on the other end ofsaid shaft, a fan mounted outside of said casing adjacent to said bearing member, said bearing member being provided with a housing for said fan.

14. In a railway vehicle, the combination with an electric driving motor having an enclosing casing and a shaft, of a driving mechanism for said railway vehicle mounted upon one end of said shaft, a bearing member supporting the other end of said shaft, a fan mounted upon said shaft outside said casing and adjacent to said bearing member, said bearing member being provided with a flange for securing to said casing, and an integral, substantially cylindrical extension glisposed outside said casing for housing said 15. In a railway vehicle, the combination with an electric driving motor having an enclosing casing and a shaft, of a driving mechanism for said railway vehicle mounted upon one end of said shaft, a bearing member supporting the other end of said shaft, a fan mounted outside said casing adjacent to said bearing member, means for providing a housing for said fan and means for providing ventilating passages from said housing to the interior of said motor.

16. In a railway vehicle, the combination with a wheel truck comprising a supporting frame, a pair of wheels and an axle therefor, of a driving motor mounted in said frame, gear mechanism disposed at one end of the motor and cooperating with said axle, and an external fan attachment on the other end of said motor.

In testimony whereof, I have hereunto subscribed my name this 2nd day of July 1923.

. DAVID C. HERSHBERGER. 

